Super Bag remaining lightweight for travel around the world or less far too :) Very strong and very large (90L). I bought the orange and blue. The backpack straps system is very convenient for globetrotters or transfers between subway stations +. Attention to 12-15 kg is quite comfortable, you have to be beyond sports to support the bag over several kilometers. From 18-20 kg, it should be limited to 1 or 2 km walk if it hurts the shoulders. The bag material is very strong and resistant to shocks and air transport. Very good resistance to deformation as (my baseball bat distorted the bag - because too much - but the bag has perfectly withstood). The bag is light and soft, it is placed on the other bags in aircraft. Mine came out 4 out of 4 times in the first 20 bags on airport carpets - a must for busy travelers!